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Updated: Jun 8, 2025
Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
Published on: July 21, 2011
High acid-base tolerance and long storage time lanthanum cerium co-doped carbon quantum dots for Fe3+ detection
Bangxing Li1, Fei Wu2, Zhenjun Xie3
1College of Science, Chongqing University of Technology, Chongqing 400054, China; The Green Aerotechnics Research Institute of CQJYU, Chongqing 400054, China; Department of Applied Physics, Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China; Chongqing Key Laboratory of New Energy Storage Materials and Devices, Chongqing 400054, China.
Abstract:
In this paper, lanthanum and cerium co-doped carbon quantum dots (LaCe-CQDs) was firstly synthesized by one step hydrothermal method. The obtained LaCe-CQDs shown sable fluorescence properties with pH values from 3 to 9 and after 4 weeks of storage. The average particle size of LaCe-CQDs, with excitation and emission wavelengths of 350 nm and 446 nm, is 3.27 ± 0.12 nm. Selective analysis of various metal ions revealed the sensitivity of LaCe-CQDs towards Fe3+ ions. Within the 0-60 μM, the fluorescence intensity exhibits a strong linear correlation with the concentration of Fe3+. The limit of detection (LOD) was determined to be 0.753 μM. Additionally, the accuracy of LaCe-CQDs were demonstrated in natural water samples. Therefore, LaCe-CQDs are a promising sensor for Fe3+ detection.
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